<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<script src="demo03_js引入页面.js"></script>

	<script>
		alert("hello world!")
	</script>
</head>
<body>
	<input type="button" name="" value="点击" onclick="alert('ok')">

</body>
</html>